Fuse carrier



Aug. 3, 1937. A. B. RYPlNsKl FUSE CARRIER Filed Jan. 7, 1956 ATTORNEYPatented Aug. 3, 1937 PATENT orifice FUSE CARRIER Albert B. Rypinski,Laurelton, N. Y., assignor to Metropolitan Device Corporation, acorporation of New York Application January 7, 1936, Serial No. 57,918 3claims. (ci. zoo- 133) The invention herein disclosed relates to a fusecarrier or holder of the pull-out type.

Such fuse carriers are frequently used for barrel type fuses andnormally consist of a base or 5 support of stiff electrical-insulatingmaterial, fuse clips and switch blades secured to one side of the baseand positioned to receive and hold fuses, and a handle pivotally securedto the other side of the base. Commonly, such fuse carriers are adaptedto carry at least two fuses. The switch blades, in the operativeposition of the carrier are received in switch clips which support thecarrier. The carrier may be removed from the operative position bypulling on the handle secured to the carrier.

The barrel type fuses, such as are usually held by such fuse carriers,generate a considerable amount of heat u nder normal full load. In thefuse carriers heretofore employed this heat generated by the fuses isreadily transmitted through the base or support to the handle that isgrasped by the hand to remove the fuse carrier. With fuses of largecapacity, the heat transmitted to the handle of the fuse carrier issuflicient to heat the handle so that it is uncomfortably hot to touchand prevents ready withdrawal of the fuse I carrier; and it is an objectof this invention to produce a fuse carrier in which this condition doesnot prevail.

A fuse carrier constructed in accordance with this invention is providedwith an air space between the support for the fuse clips and the handleprovided for inserting and removing the fuse carrier. There is,therefore, no direct transfer of heat by conduction from the fuse-clipsupport to the handle and the circulation of air set up in the air spacecarries the heat away from the support by convection. The fuse carrierthus constructed includes a fuse clip support consisting of a sheet ofstiff, fibrous, electrical-insulating material to one side of which thefuse clips are secured. Tov the other side of the fuse-clip supportthere is secured in spaced relation thereto another sheet of stilimaterial and to this latter sheet of material the handle is secured. Thespace between the two pieces of sheet material constitutes an air spacethrough which air circulates.

A fuse carrier constructed in accordance with this invention isillustrated in the accompanying drawing in which:

Fig. l is a front elevation of the fuse carrier;

g Fig. 2 is a sectional elevation taken along the line 2 2 of Figure 1;and

Fig. 3 is a rear elevation thereof.

' The fuse carrier illustrated in the drawing includes a' fuseclipsupport l made from a sheet of stili, librous, electrical-insulatingmaterial. To one side of the fuse-clip support, there are secured fourcombined fuse clips and Switch 5 blades 2, arranged in pairs andpositioned so that each pair is adapted to receive and hold a fuse asillustrated. Each of these combined fuse clips and switch bladesincludes a base 2a. secured to the support l by rivets, laterallyextending l0 spaced semi-cylindrical elements 2b extending from oppositesides of the base and adapted to receive a barrel type fusetherebetween, and a switch blade 2c formed as a lateral extension of thefuse-clip base. 15

To the side oi the support I, opposite to that to which the fuse clipsare secured, there is secured to the support by four rivets 3 a sheet ofstiff, fibrous, electrical and heat insulating material 4 of the samedimensions as the Support I. The sheet material 4 is spaced from thesupport l by spacers 5 surrounding the rivets 3 and between the supportand the sheet material 4. There is thus formed between the support l andthe sheet material 4 an air space through which air may circulate.

By the rivets 3, there is secured to the sheet material 4, the metalbase 6 of a handle 1. The handle 'l is shaped as shown and it ispivotally secured to the handle base 5 by a plate 8 spot welded to thehandle base 6. The plate 8 has semi-cylindrical extensions 8a formedtherein that receive the ends of the handle 1.

From the above description of the fuse carrier illustrated in thedrawing it will be apparent 35 that the transfer, by conduction, of heatgenerated by the fuses in the fuse clips to the handle 'l is cut off bythe air space between the support I and the handle. Furthermore, thecirculation of air through the air space set up by the heat 40 generatedby the fuses transfers, by convection, the heat to the circumambientatmosphere.

It will be obvious that various changes may be made by those skilled inthe art in the details of the embodiment of the invention illustrated 45in the drawing and described above within the principle and scope of theinvention as dened in the appended claims.

I claim:

1. A fuse carrier of the pull-out type com- 50 prising a fuse clipsupport consisting of a sheet of stili electrical insulating material,spaced fuse clips and switch blades mounted on one side of the supportand positioned and adapted to receive and hold a fuse, another sheet ofstiff in- 55 sulatlng material, a metal plate, a handle plvotallysecured to the plate, spaced securing means for securing the metal plateand the two sheets of electrical insulating material together and smallspacing elements between the sheets of insulating material whereby anunobstructed passage is provided between the sheets of insulatingmaterial for the free passage of air therebetween.

2. A fuse carrier of the pull-out type comprising a fuse clip supportconsisting of a sheet of stii electrical insulating material, spacedfuse clips and switch blades mounted on one side of the support andpositioned and adapted to re ceive and hold a fuse, another sheet ofstill insulating material of the same size as said fuse clip support, ametal plate, a handle pivotally secured to the plate, spaced securingmeans for securing the metal plate and the two sheets of electricalinsulating material together and small spacing elements between thesheets of insulating material and surrounding said securing meanswhereby an unobstructed passage is provided between the sheets ofinsulating material for the free passage of air therebetween.

3. A fuse carrier of the pull-cut type comprising a fuse clip supportconsisting of a sheet of stiff, fibrous electrical insulating material,spaced fuse clips and switch blades mounted on one side of the supportand positioned and adapted to receive a fuse, a handle supportconsisting of a sheet of stiff electrical insulating material, a handlemounted on one side of the handle support including a metal plate and ahandle pivotally secured to the plate, rivets extending through andsecuring together the fuse clip support, the handle support and themetal plate, the fuse clip support having openings therethrough for thepassage of air, and small spacing collars surrounding the rivets betweenthe fuse clip support and the handle support, whereby an unobstructedpassage is provided for the circulation of air through the fuse clipsupport and between the fuse clip support and the handle support.

ALBERT B. RYPINSKI.

